org.jwat.common

Class Numbers

java.lang.Object

org.jwat.common.Numbers

public class Numbers
extends java.lang.Object

Helper class to work with numbers and their string representation.

Author:

nicl

Field Summary

Fields

Modifier and Type	Field and Description
protected static int[]	imArr
protected static int[]	islArr Integer array for integer string length binary search.
protected static long[]	lmArr
protected static long[]	lslArr Long array for long string length binary search.

Constructor Summary

Constructors

Constructor and Description
Numbers()

Method Summary

Modifier and Type	Method and Description
static int	divu10gcc(int n) Divu10 from GNU GCC.
static int	divu10hd(int n) Divu10 from Hackers Delight.
static int	intModulo(int i, int digits)
static int	intStrLen(int i) Find the string length of the integer without leading zeroes.
static int	intTrailingZeros(int i) Returns the number of trailing zeroes in an integer, or zero if the number is 0.
static long	longModulo(long l, int digits)
static int	longStrLen(long l) Find the string length of the long without leading zeroes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

islArr

protected static int[] islArr

Integer array for integer string length binary search.

lslArr

protected static long[] lslArr

Long array for long string length binary search.

imArr

protected static int[] imArr

lmArr

protected static long[] lmArr

Constructor Detail

Numbers

public Numbers()

Method Detail

intStrLen

public static int intStrLen(int i)

Find the string length of the integer without leading zeroes.

Parameters:

i - integer value

Returns:

string length of the integer

longStrLen

public static int longStrLen(long l)

Find the string length of the long without leading zeroes.

Parameters:

l - long value

Returns:

string length of the long

intTrailingZeros

public static int intTrailingZeros(int i)

Returns the number of trailing zeroes in an integer, or zero if the number is 0.

Parameters:

i - number to count trailing zeroes in

Returns:

the number of trailing zeroes in an integer, or zero if the number is 0

intModulo

public static int intModulo(int i,
                            int digits)

longModulo

public static long longModulo(long l,
                              int digits)

divu10hd

public static int divu10hd(int n)

Divu10 from Hackers Delight.

Parameters:

n - integer to divide by 10

Returns:

integer divided by 10

divu10gcc

public static int divu10gcc(int n)

Divu10 from GNU GCC.

Parameters:

n - integer to divide by 10

Returns:

integer divided by 10